sudo iptables -A OUTPUT -d 192.168.0.0/16 -j ACCEPT
sudo iptables -A INPUT -s 192.168.0.0/16 -j ACCEPT
sudo iptables -A OUTPUT -d 172.16.0.0/16 -j ACCEPT
sudo iptables -A INPUT -s 172.16.0.0/16 -j ACCEPT
sudo iptables -P OUTPUT DROP
sudo iptables -P INPUT DROP
